<template>
  <div class="login-container" >

    <el-form class="login-form" ref="loginForm" :model="loginForm" :rules="loginRules"  auto-complete="on" label-position="left" datasrc="">

      <div class="title-container" >

        <h5 class="title" style="margin-top: 40px">后台管理系统</h5>

      </div>

      <el-form-item prop="userName" style="margin-top: 20px">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="userName"
          v-model="loginForm.userName"
          placeholder="用户名"
          name="userName"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="left" manual>
        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password" />
          </span>
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            placeholder="密码"
            name="password"
            tabindex="2"
            auto-complete="on"
            @keyup.native="checkCapslock"
            @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
          </span>
        </el-form-item>
      </el-tooltip>

<!--      <el-checkbox v-model="loginForm.remember" style="margin-bottom: 20px;margin-left: 5px;">记住我</el-checkbox>-->

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录</el-button>

    </el-form>

    <div class="account-foot-copyright">
      <span>作者dszzz</span>
    </div>
  </div>
</template>

<script>
  import { mapMutations } from 'vuex'
  import loginApi from '@/api/login'

  export default {
    name: 'Login',
    data () {

      const validateUsername = (rule, value, callback) => {
        if (value.length < 5) {
          callback(new Error('用户名或密码错误'))
        } else {
          callback()
        }
      }
      const validatePassword = (rule, value, callback) => {
        if (value.length < 5) {
          callback(new Error('用户名或密码错误'))
        } else {
          callback()
        }
      }
      return {
        imgSrc:require('../../assets/bg/loginbg.jpg'),
        loginForm: {
          userName: '',
          password: '',
          remember: false
        },
        loginRules: {
          userName: [{ required: true, trigger: 'blur', validator: validateUsername }],
          password: [{ required: true, trigger: 'blur', validator: validatePassword }]
        },
        passwordType: 'password',
        capsTooltip: false,
        loading: false,
        showDialog: false
      }
    },
    created () {
      // window.addEventListener('storage', this.afterQRScan)
    },
    mounted () {
      if (this.loginForm.userName === '') {
        this.$refs.userName.focus()
      } else if (this.loginForm.password === '') {
        this.$refs.password.focus()
      }
    },
    destroyed () {
      // window.removeEventListener('storage', this.afterQRScan)
    },
    methods: {
      checkCapslock ({ shiftKey, key } = {}) {
        if (key && key.length === 1) {
          /*// 开启大小写*/
          if (shiftKey && (key >= 'a' && key <= 'z') || !shiftKey && (key >= 'A' && key <= 'Z')) {
            this.capsTooltip = true
          } else {
            this.capsTooltip = false
          }
        }
        if (key === 'CapsLock' && this.capsTooltip === true) {
          this.capsTooltip = false
        }
      },
      showPwd () {
        if (this.passwordType === 'password') {
          this.passwordType = ''
        } else {
          this.passwordType = 'password'
        }
        this.$nextTick(() => {
          this.$refs.password.focus()
        })
      },
      handleLogin () {
        let _this = this
        this.$refs.loginForm.validate(valid => {
          if (valid) {
            this.loading = true
            loginApi.login(this.loginForm).then(function (result) {
              if (result && result.code === 1) {
                _this.setUserName(_this.loginForm.userName)
                _this.$router.push({ path: '/' })
              } else {
                _this.loading = false
                _this.$message({
                  message: result.message,
                  type: 'error'
                })
              }
            }).catch(function (reason) {
              _this.loading = false
            })
          } else {
            return false
          }
        })
      },
      ...mapMutations('user', ['setUserName'])
    }
  }
</script>

<style lang="scss">

  /* 修复input 背景不协调 和光标变色 */
  /* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

  $bg:#283443;
  $light_gray:#fff;
  $cursor: #fff;

  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
      color: $cursor;
    }
  }

  /* reset element-ui css */
  .login-container {
    .el-input {
      display: inline-block;
      height: 47px;
      width: 85%;

      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: $light_gray;
        height: 47px;
        caret-color: $cursor;

        &:-webkit-autofill {
          box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-text-fill-color: $cursor !important;
        }
      }
    }

    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.1);
      border-radius: 5px;
      color: #454545;
    }
  }
</style>

<style lang="scss" scoped>
  $bg: #34254b;
  $dark_gray:#889aa4;
  $light_gray:#eee;

  .login-container {
    background: url("../../assets/bg/loginbg.jpg");//这里的地址是用你项目中图片所在的路径为准
    background-repeat: no-repeat;//将图片样式不重复
    background-size: 100% 100%;  //设置图片大小
    position: fixed; /* 充满全屏 */


    min-height: 100%;
    width: 100%;
    background-color: white;
    overflow: hidden;

    .login-form {
      border: 5px solid ;
      border-radius: 20px;
      position: relative;
      width: 520px;
      max-width: 100%;
      padding:30px 50px 10px 50px;
      margin:120px auto auto auto;
      overflow: hidden;
      /*background: rgba(252, 254, 255, 0.11)*/
      background: black;
    }
    .background{
      width:100%;
      height:100%;  /**宽高100%是为了图片铺满屏幕 */
      z-index:-1;
      position: absolute;
    }
    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .svg-container {
      padding: 6px 5px 6px 15px;
      color: $dark_gray;
      vertical-align: middle;
      width: 30px;
      display: inline-block;
    }

    .title-container {
      border: 2px solid ;
      border-radius: 20px;
      position: relative;
      border-style: solid;
      border-color: white;
      .title {
        font-size: 26px;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }
    }

    .show-pwd {
      position: absolute;
      right: 10px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }

    .thirdparty-button {
      position: absolute;
      right: 0;
      bottom: 6px;
    }

    @media only screen and (max-width: 470px) {
      .thirdparty-button {
        display: none;
      }
    }
  }
</style>
